Sawmill attachment



w. H. GILMOUR. SAWMILL ATTACHMENT.

APPLICATION FILED AUG-4,1919. 1,340,042. I Patented May 11, 1920.

2 SHEETS-SHEET I.

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APPLICATION man Mic-4, 1919. v 1,340,042. Patented May 11, 1920.

2 SHEETS-SHEET 2.'

WILLIAM HUGH GILMOUR, OF ST. LANDRY, LOUISIANA.

SAWMILL ATTACHMENT.

I Specification of Letters Patent.

Patented May 11, 1920.

Application filed August 4, 1919. Serial No. 315,199.

To all whom it may concern Be it known that I, WILLIAM H. GILMOUR, acitizen of the United States, residing at St. Landry, in the parish ofEvangeline and State of Louisiana, have invented certain new and usefulImprovements in Sawmill Attachments, of which the following is aspecification.

This invention relates to an attachment for the knees of saw mills ofthe small or medium types, and an object of the invention is to providemeans for adjusting the timber or log engaging space of the kneestructure, one independently of the other to permit proper positioningof the logs or timber to be sawed to permit the cutting of tapertimbers, such as wagon tongues or the like or for cutting a log whichtapers toward one end, so as to prevent the waste of relatively goodlumber which might be necessary in breaking or squaring the logs.

In the mills used in small or medium sized saw mills, no provision ismade upon the knees of the saw carriage for adjusting the relativeposition of the timber engaging spaces of the knee, and when cuttingtaper timber or logs of which one end is smaller than the other, theblocks of wood are usually employed to position the timber or logs to besawed at the proper position with respect to the saw carriage and thesaw. This is inconvenient, requires considerable time in properlyadjusting the logs and in making and applying a block of the right sizeand where wagon tongues or analogous shaped timbers are to be cut, thecontinual changing of the timber and logs as well as the positioningblocks requires considerable time and labor, and it is therefore anobject of this invention to provide an attachment for the knees of sawmills of this type which includes a movable member, adapted to engagethe timber or logs to be out which member is adjustable with respect tothe shapeof the knees-to which it is attached and being carried by theknee is movable therewith, so that continuous cutting of taperedmaterials may be made without requiring the time absorbing andundesirable work in changing a wooden block, and also to provide meanswhereby this movable knee attachment may be held in various adjustedpositions, which adjustment is provided through the medium of apivotally mounted hand lever.

Other objects of the invention will appear in the following detaileddescription taken in connection with the accompanying drawings, forminga part of this specification and in which drawings;

Figure 1 is a perspective view of a saw millshowing the improved kneeattachment applied thereto.

Fig. 2 is a side elevation of the knee attachment.

Fig. 3 is an edge elevation of the knee attachment.

Fig. 4 is a side elevation of the knee attachment having one housingplate thereof removed.

Fig. 5 is a detail view of the hand lever illustrating the dog mechanismcarried thereby for holding the lever and adjustable log engaging lug inadjusted positions.

Fig. 6 is a detail perspective view of a part of the operating levermechanism of the knee block.

Fig. 7 is a horizontal fragmentary section through the adjustable kneeblock showing one of the links of the lever mechanism connected thereto,and

Fig. 8 is a detail section through the housing illustrating the means ofconnecting the housing plates together.

Referring more particularly to the drawings, wherein like charactersindicate like and corresponding parts throughout the several views, theknees 10 and 11 of the saw mill 12 eachhave one of the adjustableattachments 15 mounted thereon. The attachments 15 comprise a housingformed of plates 16 and 17, which may be bolted to the knees by thebolts 18, which also serve to connect the plates 16 and 17. Certain ofthe bolts 18 only extend through the plates 16 and 17 and the same havespacing sleeves .18 positioned thereon, which are arranged intermediatethe plates 16 and 1.7 and hold the same in correct relation to eachother. A hand lever 19 is pivotally ctmnected as shown at 21' to theinner plate and its lower end is ionnected by a link 31 to a lever 22.This lever 22 is pivotally mounted intermediate its endsupon a bolt orpin 23, about which a washer 24 is positioned to permit free pivotalmovement of the lever 22. A lever 25 which is pivotally supported by asuitable pin 26 is pivotally-and slidably connected to the upper end ofthe lever 22, which lever is in turn connected by a link 27 to theadjustable lmee block or plate 28. This plate 28 is preferably made ofangle iron presenting a flat surface 29 for engagement against the logor timber to be cut by the saw mill structure 12. The adjustable kneeblock or plate member 28 is connected near its lower end by link30,

to the lever 22, below the pivot thereof, and by the rocking movement ofthe hand levers 19, the adjustable knee blocks 28 may be moved outwardlyfrom or inwardly toward the face of theknee or 11 to which theattachment is secured. Suitable stops 31 arecarried by the plates 16 forlimiting the inward movement of the adjustable member 28. The plates 16and 17 have their rear upper corners cut away and .teeth 32 are formedupon the upper edgeof the plate 16, at the cut out portion the saidteeth being adapted to coact with the pawl '33 of tions thereof parallelto and in spaced relation to the plate 16, the said space between theears and plate being of sufficient distance to receive the carrying partof the knee block 28 therebetween, for guiding the movement of theblock.

As shown in Fig. 6 of. the drawings, a lever 22 is offset intermediateits ends, at

-its pivot, while the lever 25 is offset at the end which is connectedto the lever 22, so

as to permit the positioning of these levers but;

in arelatively narrow space, without impairingthe efficiency of theoperation of the device.

Changesin details may be made without departing from the spirit. of thisinvention,

1 I claim: i

' l. The combination with a saw mill in cluding log engaging and movingknees, of housings detachably carried by said knees, knee blocksadjustably carried by said housings and movable for adjusting thepositions of their log engaging faces relative'to the faces of theknees.

2. The combination with a saw mill includinglog engaging and movingknees, of housings detachably carried by said. knees, knee blocks adustably carried by said housings and movable for adjusting the positionsof 1311811 log engaging faces relative to the faces of the knees, alever carried to said blocks for operating them, teeth carried by saidhousings, and dog mechanisms carriedby said levers for engagement withsaid teeth to hold the levers and knee blocks in adjusted. positions.

3. A timber tapering attachment forsaw housing, and means for adjustingthe position of said knee blocks.

a. A timber tapering attachment for saw mills comprising a housingadapted for at tachment to a knee of a saw mill, a knee block adjustablycarried by said housing, a lever pivotally connected to said housing,and levers and links connecting said hand lever and said knee block foradjusting the position of the knee block upon movement of the lever.

5. A timber tapering attachment for saw mills comprising a housingadapted for attachment to a knee of a saw mill, a knee block adjustablycarried by said housing, a lever pivotally connected to saidv housing,levers and links connecting said hand lever and said knee block foradjusting the position of the knee block upon movement'of the lever,ears formed upon said housing and turned. inwardly to form guides formovement of the knee block.

6. A timber taperingattachment for saw mills comprising a housingadapted for at tachment .to a knee of a, saw mill, a knee blockadjustably carried by said housing, a lever pivotally connected to saidhousing, levers and links connecting said hand lever and said kneeblockfor adjusting the position of the knee block upon movement of the lever,ears formed upon said housingand turned inwardly to form guides formovement of the knee block, teeth carriedby.

said housing and afldog mechanism "carriedv by said hand lever forengagement with said" teeth to hold said lever and knee block inadjusted positions.

7. The combination with a saw 'mill in-E cludinglog engaging and movingknees, of a. tapering attachment for the knees in-.: cluding aslidable-block, an operating lever for the block, a lever pivotedintermediate its ends, and arranged intermediate the ope erating leverand. the 'block,1means operatively connecting the operating lever andthe second mentionedlever, and means op eratlvely connecting theterminals .of'thesecond mentioned lever wi'th-the; slidingblock.

:8. The combination with a saw mill} in eluding logengagmgandinovmgknees, of 1120 a tapering attachment forthe knees I includ ing a'slidable block, an operatinglever for the block, alever pivotedintermediate its ends, andarranged intermediate the operating lever andthe block, means operatively connecting the operating-lever and thesecond mentioned lever, and links carried by the terminals of the secondmentionedlever adjacent to its terminals. v 1 9. :The combinationwith avsaw-mill inand pivotally connected to the slidable block eluding logengaging and moving knees, of a tapering attachment for the kneesincluding a vertical slidable block, an operating lever pivotedintermediate its ends, a lever pivoted intermediate its ends andarranged intermediate the slidable block and the operating lever a linkpivotally connecting the lower end of the operating lever and the lowerend of the second mentioned lever together below the pivot pointsthereof, a link pivotally connected to the second mentioned lever and tothe slidable block adjacent to their lower ends, a third lever pivotedintermediate its ends adjacent to the upper end of the second mentionedlever and the slidable block, a link connecting the forward end of thethird-mentioned lever with the block adjacent to the upper end thereof,and means operatively connecting the upper end of the second men- 20tioned lever with the third mentioned lever.

WILLIAM HUGH GILMOUR.

